Join David Hatcher Childress and British Christopher Dunn as they journey to Cuzco in the Andes Mountains to examine for the possible use of advanced rock-machining techniques. Going to cities and megalithic quarries, they again examine saw marks, advanced lifting and moving techniques, as well as evidence of Pre-Incan megalith builders at and Ollantaytambo. They continue on to where they investigate the strange megalithic towers and a "stargate" cut into solid rock. Finally they examine the huge granite megaliths at Tiwanaku and Puma Punku for signs of the use of power tools and other advanced, . Blows the lid off South American archeology with evidence of advanced technology thousands of years old.